Soleus H-reflex inhibition during gait initiation in Parkinson's disease.
Identifieur interne : 003113 ( PubMed/Corpus ); précédent : 003112; suivant : 003114Soleus H-reflex inhibition during gait initiation in Parkinson's disease.
Auteurs : Koichi Hiraoka ; Yoshimi Matsuo ; Kazuo AbeSource :
- Movement disorders : official journal of the Movement Disorder Society [ 0885-3185 ] ; 2005.
English descriptors
- KwdEn :
- MESH :
- methods : Electromyography.
- physiology : Gait, H-Reflex, Neural Inhibition.
- physiopathology : Ankle Joint, Muscle, Skeletal, Parkinson Disease.
- Adult, Aged, Female, Humans, Male, Middle Aged, Time Factors.
Abstract
The soleus H-reflex excitability during gait initiation was investigated in Parkinson's disease. Eleven patients participated in this study. Patients stepped forward as soon as the start signal flashed. Soleus H-reflex was evoked from the trailing leg 100, 300, or 600 msec after the start signal. The electromyographic activity in the soleus muscle immediately before evoking the H-reflex and the ankle joint motion were recorded. The soleus H-reflex was inhibited 300 msec after the start signal. The amount of the soleus H-reflex inhibition was inversely correlated with the Hoehn and Yahr stage; Items 14, 29, and 31 of the Unified Parkinson's Disease Rating Scale; and the delay of the onset of the ankle dorsiflexion from the start signal. In contrast, the amount of electromyographic activity immediately before evoking the H-reflex was not significantly correlated with those measures but was significantly correlated with Item 22 of the Unified Parkinson's Disease Rating Scale. Those findings indicate that the amount of soleus H-reflex inhibition during gait initiation depends on the severity of the disease. Abnormality of descending command may be related to the severity-dependent H-reflex inhibition.
DOI: 10.1002/mds.20448
PubMed: 15747362
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pubmed:15747362Le document en format XML
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<author><name sortKey="Hiraoka, Koichi" sort="Hiraoka, Koichi" uniqKey="Hiraoka K" first="Koichi" last="Hiraoka">Koichi Hiraoka</name>
<affiliation><nlm:affiliation>Department of Physical Therapy, Osaka Prefectural University, Osaka, Japan. hiraoka@osaka-hsu.ac.jp</nlm:affiliation>
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<author><name sortKey="Matsuo, Yoshimi" sort="Matsuo, Yoshimi" uniqKey="Matsuo Y" first="Yoshimi" last="Matsuo">Yoshimi Matsuo</name>
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<author><name sortKey="Abe, Kazuo" sort="Abe, Kazuo" uniqKey="Abe K" first="Kazuo" last="Abe">Kazuo Abe</name>
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<series><title level="j">Movement disorders : official journal of the Movement Disorder Society</title>
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<term>Aged</term>
<term>Ankle Joint (physiopathology)</term>
<term>Electromyography (methods)</term>
<term>Female</term>
<term>Gait (physiology)</term>
<term>H-Reflex (physiology)</term>
<term>Humans</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Muscle, Skeletal (physiopathology)</term>
<term>Neural Inhibition (physiology)</term>
<term>Parkinson Disease (physiopathology)</term>
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<keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Ankle Joint</term>
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<term>Parkinson Disease</term>
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<front><div type="abstract" xml:lang="en">The soleus H-reflex excitability during gait initiation was investigated in Parkinson's disease. Eleven patients participated in this study. Patients stepped forward as soon as the start signal flashed. Soleus H-reflex was evoked from the trailing leg 100, 300, or 600 msec after the start signal. The electromyographic activity in the soleus muscle immediately before evoking the H-reflex and the ankle joint motion were recorded. The soleus H-reflex was inhibited 300 msec after the start signal. The amount of the soleus H-reflex inhibition was inversely correlated with the Hoehn and Yahr stage; Items 14, 29, and 31 of the Unified Parkinson's Disease Rating Scale; and the delay of the onset of the ankle dorsiflexion from the start signal. In contrast, the amount of electromyographic activity immediately before evoking the H-reflex was not significantly correlated with those measures but was significantly correlated with Item 22 of the Unified Parkinson's Disease Rating Scale. Those findings indicate that the amount of soleus H-reflex inhibition during gait initiation depends on the severity of the disease. Abnormality of descending command may be related to the severity-dependent H-reflex inhibition.</div>
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<Abstract><AbstractText>The soleus H-reflex excitability during gait initiation was investigated in Parkinson's disease. Eleven patients participated in this study. Patients stepped forward as soon as the start signal flashed. Soleus H-reflex was evoked from the trailing leg 100, 300, or 600 msec after the start signal. The electromyographic activity in the soleus muscle immediately before evoking the H-reflex and the ankle joint motion were recorded. The soleus H-reflex was inhibited 300 msec after the start signal. The amount of the soleus H-reflex inhibition was inversely correlated with the Hoehn and Yahr stage; Items 14, 29, and 31 of the Unified Parkinson's Disease Rating Scale; and the delay of the onset of the ankle dorsiflexion from the start signal. In contrast, the amount of electromyographic activity immediately before evoking the H-reflex was not significantly correlated with those measures but was significantly correlated with Item 22 of the Unified Parkinson's Disease Rating Scale. Those findings indicate that the amount of soleus H-reflex inhibition during gait initiation depends on the severity of the disease. Abnormality of descending command may be related to the severity-dependent H-reflex inhibition.</AbstractText>
<CopyrightInformation>Copyright 2005 Movement Disorder Society.</CopyrightInformation>
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